We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK


97% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Measurement of the semileptonic charge asymmetr...
View graph of relations

« Back

Measurement of the semileptonic charge asymmetry using Bs^0 -> D_s mu X decays

Research output: Contribution to journalJournal article


Article number011801
<mark>Journal publication date</mark>3/01/2013
<mark>Journal</mark>Physical Review Letters
Number of pages7
Early online date7/07/12
<mark>Original language</mark>English


We present a measurement of the time-integrated flavor-specific semileptonic charge asymmetry in the decays of Bs mesons that have undergone flavor mixing, a^s_ls, using B_s^0 (barB_s^0) -> D_s^-/+ mu^+/- X decays, with D_s^-/+ -> phi pi^-/+ and phi K^+ K^-, using 10.4 fb^-1 of proton-antiproton collisions collected by the D0 detector during Run II at the Fermilab Tevatron Collider. A fit to the difference between the time-integrated D_s^-$ and D_s^+ mass distributions of the B_s^0 and barB^0_s candidates yields the flavor-specific asymmetry a^s_ls = [-1.08 pm 0.72 (stat) +/-0.17 (syst)]% which is the most precise measurement and in agreement with the standard model prediction.

Bibliographic note

7 pages, 3 figures, submitted to Phys. Rev. Lett